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A novel Dynamic Key based chaotic
image encryption Department of Computer science and
Engineering, National Institute of Technology
,Trichy, India vidhu.cs111@gmail.com, brindham@nitt.edu
Abstract Many encryption algorithms are proposed based on
chaos and many of them have been shown to be successful because of the
adapting nature of the traditional confusion-diffusion architecture. Still
few problems have been identified. The plain image is not related with the
cipher image which induces the chosen /known plain text attack. Further the
keys used for the encryption is always fixed and is not chosen dynamically.
In order to reduce these flaws, a novel chaotic encryption is proposed with
dynamic keys selected from plain image itself. For the key generation, hyper
chaos system is used along with the sum of the intensity values to encrypt
the image with high security. The pixel change rate and changed intensity
values are as high as 99.7123 and 33.4432 respectively which exhibit the
resistance against chosen/known plain text attack. Simulations are performed
for histogram analysis, correlation between adjacent pixels, entropy analysis
and sensitivity analysis which reveals that the proposed scheme have good
security which in turn can be adopted for secure communication applications. Keywords: Hyper chaos, Dynamic keys, Image
encryption, Security +: Corresponding author: R.Vidhya Department of of Computer science and Engineering, National Institute of Technology Trichy, India
Journal
of Internet Services and Information Security
(JISIS), 8(1): 46-55,
February 2018 DOI: 10.22667/JISIS.2018.02.28.046 [pdf] |